#[7] Tom is good at his work,but he seems to _____ confidenc

#[7] Tom is good at his work,but he seems to _____ confidence.
A.lack B.lack of C.lacking in D.short of
翻译包括选项并且分析.

a 动词lack
b be lack of 这里lack是名词
c to后不能用doing
d be short of 词组
tom擅长他的工作.但是他看起来缺乏信心

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